Mitsubishi Outlander GS45X. Manual - part 461

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-271

26

Brake fluid pressure 
switch

Brake fluid level is lower than the 
"LOWER" marking.

Low

Brake fluid level is higher than the 
"LOWER" marking.

Normal

28

ASC/TCL off switch

When the ASC OFF switch is not 
operated (when the ASC control is 
available)

ON

When the ASC OFF switch is operated 
(pressed and held for 3 seconds or 
more)(when the ASC control is 
prohibited)

OFF

When the ASC OFF switch is operated 
(pressed and held for 15 seconds or 
more)(when the ASC OFF control is 
prohibited by fail-safe function)

*2

ON

45

SAS OK flag

When the steering wheel sensor 
neutral point is learned

Comp

When the steering wheel sensor 
neutral point is not learned

Not Comp

When the steering wheel sensor is 
defective

SAS fail
SAS fail&No Comp

65

Engine Speed

When the accelerator pedal is 
depressed (engine started)

The tachometer display and 
the scan tool display almost 
agree with each other.

66

Engine torque

Displays the engine torque.

67

APS

Displays the accelerator pedal 
opening angle.

68

Allow ESP torque request

Permitted

70

Target gear

When the selector lever is operated

Displays the selector lever 
position.

71

Actual gear

72

Master cylinder pressure 
Offset

The difference between the neutral 
position that was input to the 
ASC-ECU before the master cylinder 
pressure sensor calibration and the 
neutral position after the calibration.

-8 to 8 bar

73

Lateral G sensor offset

The difference between the neutral 
position that was input to the 
ASC-ECU before the G and yaw rate 
sensor calibration and the neutral 
position after the calibration.

-0.15 to 0.15 G

86

Ignition switch

Ignition switch: ON

ON

87

Ignition switch (input)

Ignition switch: ON

ON

88

Vehicle speed

Perform a test run of the vehicle.

The speedometer display and 
the scan tool display almost 
agree with each other.

Item No. Check item

Check condition

Normal condition

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-272

NOTE: 

.

•

*1

: The G and yaw rate sensor does not detect longitudinal acceleration of a vehicle, thus "0 G" is always 

set.

•

*2

: When the ASC OFF switch is pressed and held for 15 seconds, the ASC system returns to the ON sta-

tus.

91

Brake pressure sensor

The brake pedal is depressed.

ON

The brake pedal is released.

OFF

96

G sensor offset

The difference between the neutral 
positions before the calibration and 
after the calibration received in the 
ASC-ECU at G & yaw rate sensor 
calibration.

• 0 G

*1

 (fixed value)

 

<Vehicles with FWD>

• -0.15 to 0.15 G 

<Vehicles with AWD, FWD 
with idle neutral control>

97

Yaw rate sensor offset

The difference between the neutral 
position that was input to the 
ASC-ECU before the G and yaw rate 
sensor calibration and the neutral 
position after the calibration.

-6.0 to 6.0 deg/s

105

Power supply voltage (input)

Battery positive voltage (10 to 
18 V ASC operatable range)

120

Parking brake switch 
(Input)

When the parking brake lever is pulled 
up:

ON

When the parking brake lever is 
released:

OFF

128

A.S.C./TCL off switch 
(input)

The ASC OFF switch is pressed.

ON

The ASC OFF switch is not operated.

OFF

Item No. Check item

Check condition

Normal condition

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-273

ACTUATOR TEST REFERENCE TABLE

M1355001600387

Using scan tool, the following actuators can be forc-
ibly operated:
NOTE: 

.

•

ABS and ASC are operated by ASC-ECU.

•

When ASC-ECU is disabled due to the fail-safe 
function, the actuator test cannot be performed.

•

The actuator test can be performed only when 
the vehicle is stationary.

•

While the actuator test is performed, the ABS 
warning light flashes at a rate of 2 Hz.

•

After the actuator test has been performed, the 
brake warning light, ABS warning light, ASC 
operation display, and ASC OFF display illumi-
nate until the ignition switch is turned to ON again 
or the communication between scan tool and 
ASC-ECU is terminated.

.

Actuator test specifications

.

Operation pattern of items 01 to 08 

Item No.

Check item

Driven component

01

FL wheel ABS drive

Solenoid valve for the corresponding 
channel of the hydraulic unit and pump 
motor (simplified inspection mode)

02

FR wheel ABS drive

03

RL wheel ABS drive

04

RR wheel ABS drive

05

FL wheel TCL drive

06

FR wheel TCL drive

07

RL wheel TCL drive

08

RR wheel TCL drive

09

Engine TCL drive

Outputs the engine torque control signal 
(engine torque = 0 N

⋅m) to the engine 

ECU for three seconds.

AC400776

1second

2 seconds

Approx. 0.05
second

Approx. 0.01
second

AK

End

Scan tool actuator test
(Item No.05, 06, 07, 08) start

End

Increase in pressure

Steady pressure

Reduction in pressure

Increase in pressure

Steady pressure

Reduction in pressure

Drive

Stop

Cut valve,
Suction valve
(TCL/Skid control)

Solenoid valve
(ABS)

Pump motor

Scan tool actuator test
(Item No.01, 02, 03, 04) start

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-274

CHECK AT ECU TERMINALS

M1355001700663

.

TERMINAL VOLTAGE CHECK

Required Special Tool:
MB991997: ASC Check Harness
Connect the special tool ASC check harness (MB991997) to 
measure the voltage between each check connector terminal 
and the ground terminal (No.16 or 47).

AC611138AO

ASC-ECU

MB991997

A-02 ASC-ECU 
harness connector

Check harness

Terminal No.

Check item

Check condition

Normal condition

1

Motor power supply

Ignition switch: ON (OFF) Approximately 

system voltage

2

ASC-ECU power supply

Ignition switch: ON

Approximately 
system voltage

Ignition switch: OFF

Approximately 
system voltage

8

Ignition switch signal for ASC-ECU 
activation

Ignition switch: ON

Approximately 
system voltage

Ignition switch: OFF

1 Volt or less

22

G and yaw rate sensor power supply

Ignition switch: ON

Approximately 
system voltage

32

Solenoid valve power supply

Ignition switch: ON (OFF) Approximately 

system voltage

34

Wheel speed sensor (FR) power 
supply

Ignition switch: ON

Approximately 
system voltage